Twisted seat strip sewing machine and seat cushions produced by the device

Abstract

This invention relates to the field of seat cushion processing technology, specifically a twisted seat strip sewing machine and the seat cushions produced by this device. The machine includes a core-covered strip sewing needle that reciprocates vertically, and a hook plate that slides reciprocally below the needle along the feed direction of the base pad. When the core-covered strip sewing needle rises, the hook plate moves forward to below the needle, tilting the core-covered strip to one side and pulling it backward, thus clearing the movement area of ​​the needle. This invention solves the problem in traditional seat cushion technology where, due to the relatively large diameter of the core-covered strip, existing devices can only sew the strip onto the seat cushion surface in a straight line. Because the straight core-covered strip lacks friction and support between itself and the human buttocks, it cannot provide stable support for the buttocks.

Description

Technical Field

[0001] This invention relates to the field of seat cushion processing technology, specifically to a twisted seat cushion strip sewing machine and seat cushions produced by the device. Background Technology

[0002] To improve comfort, existing seat cushions typically have cushion strips sewn onto their surface. These cushion strips are made by wrapping the core material with fabric strips, rolling the fabric strips into a tube, and placing sponge strips inside to enhance comfort and support during use.

[0003] A prior art patent with publication number CN218147237U discloses a device including a base with a frame on the base; a wire feeding and adjusting device comprising an adjusting drive assembly, at least two discharge pipes, and at least two wire splits; the discharge pipes are used to feed at least two processing threads; one wire split is connected to one discharge pipe, and the other wire split is connected to the other discharge pipe; the adjusting drive assembly is connected to the frame and drivenly connected to each wire split; a support base is movably connected to the frame; the support base is provided with a wire clamping mechanism and a threading mechanism, the wire clamping mechanism being connected to the wire split; the threading mechanism is used to feed the processing thread to the sewing machine head. The technical solution of this invention can ensure processing quality and improve processing efficiency.

[0004] With use, existing devices, including those mentioned above, have gradually revealed shortcomings in this technology, mainly in the following aspects:

[0005] First, because the diameter of the core strip is relatively thick, mostly more than 10mm, the existing devices can only sew the core strip onto the surface of the seat cushion in a straight line. Since the straight core strip lacks friction and support between itself and the human buttocks, it cannot provide stable support for the human buttocks.

[0006] Secondly, existing seat cushions without core-filled strips, while allowing for various shapes to be sewn due to their small strip diameter, also result in a thin seat cushion requiring multiple layers of sewing. Furthermore, the stiffer strips lack support and wrapping for the buttocks, failing to meet modern people's comfort requirements for seat cushions.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0008] In view of the shortcomings of the prior art, the present invention solves the problem that in the traditional technology of seat cushions, due to the large diameter of the core strip, the existing device can only sew the core strip to the surface of the seat cushion in a straight line. Since the straight core strip lacks friction and support between it and the human buttocks, it cannot provide stable support for the human buttocks.

[0009] To address the above problems, the present invention provides the following technical solution:

[0010] A twisted seat cushion strip sewing machine includes a core-spun strip sewing needle that reciprocates vertically, and a hook plate that slides reciprocally below the core-spun strip sewing needle along the feed direction of the seat cushion.

[0011] When the core-covered strip sewing needle rises, the hook plate moves forward to below the core-covered strip sewing needle, tilts the core-covered strip to one side, pulls the core-covered strip backward, and moves it out of the movement area of ​​the core-covered strip sewing needle.

[0012] As an optimized solution, a guide plate is fixedly arranged in parallel below the hook plate, and a guide groove is opened on the guide plate corresponding to the core-spun strip sewing needle.

[0013] As an optimized solution, the hook plate includes an inclined front end face that deflects the core strip to one side, and the tail end of the inclined front end face is provided with a pull groove that pulls the core strip backward.

[0014] As an optimized solution, a locking thread threading mechanism is provided below the guide plate for reciprocating sliding. When the core-covered strip sewing needle drives the core-covered strip through the bottom of the base pad, the threading needle of the locking thread threading mechanism will thread the locking thread through the core-covered strip to prevent the core-covered strip from detaching from the base pad.

[0015] As an optimized solution, the core-spun strip sewing needle is provided with a core-spun strip thread hole, a threading channel is provided above the core-spun strip thread hole to avoid the locking thread threading mechanism, and a thread-removal channel is provided below the threading channel to remove the locking thread from the threading channel.

[0016] As an optimized solution, the lower end of the core-spun strip sewing needle is provided with an inclined needle tip, the inclination direction of which is opposite to the inclination direction of the inclined front end face.

[0017] As an optimized solution, several core-spun strip sewing needles are arranged side by side, and the number of hook plates and guide slots matches the number of core-spun strip sewing needles.

[0018] As an optimized solution, several hook plates are fixed together on a pull plate, and an L-shaped first swing plate is hinged to the upper end of the pull plate. A connecting rod is hinged to the other end of the first swing plate, and the lower end of the connecting rod is hinged to a rotating first rotating disk.

[0019] As an optimized solution, several core-spun strip sewing needles are fixed together on a side plate. A vertical rod is hinged to the lower end of the side plate, and a second swing plate with an L-shape is hinged to the lower end of the vertical rod. A linkage rod is hinged to the other end of the second swing plate, and the other end of the linkage rod is hinged to a second rotating disk that is rotatably arranged.

[0020] The present invention also discloses a seat cushion produced by the device, wherein the core strip is stitched in a twisted shape to the upper surface of the seat cushion to form the seat cushion.

[0021] As an optimized solution, the several puncture holes formed by the core-spun strip sewing needle in the bottom pad are in the same straight line direction.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] When sewing the base pad and the core-covered strip, the core-covered strip is passed through the threading hole on the core-covered strip sewing needle. The core-covered strip is continuously raised by the sewing needle, and the base pad is horizontally passed under the guide plate. The core-covered strip sewing needle drives the core-covered strip through the guide groove. After piercing the base pad, the threading needle of the locking thread mechanism passes the locking thread sequentially through the threading channel. After the locking thread threading mechanism hooks one end of the locking thread, the threading needle withdraws from the threading channel. As the core-covered strip sewing needle moves the core-covered strip upward, the locking thread will exit from the unwinding channel. It abuts against the bent core thread to prevent the core thread from falling out of the puncture hole in the bottom pad; when the core strip sewing needle drives the core strip to rise and reset, the hook plate moves forward, and after the inclined front face guides the core strip to one side, the hook plate moves backward and uses the pull groove to pull the core strip to one end. At the same time, the bottom pad will move backward synchronously with the hook plate under the winding structure of the sewing machine body. After the hook plate moves backward into place, the core strip sewing needle drives the core strip to pass through the guide groove again to realize the above cycle action.

[0024] This sewing structure allows core-spun strips with a diameter of 10mm or more to be sewn onto the base pad. The guide groove and hook plate allow the core-spun strip to be reversed, enabling it to be sewn onto the base pad in a twisted pattern. By sewing the core-spun strip onto the base pad in a twisted pattern, the contact area with the human buttocks can be increased, thus improving the support for the human buttocks.

[0025] Furthermore, this device allows for the sewing of core-filled strips with a diameter of 10mm or more onto the base mat in a single stitch, achieving the desired cushion thickness. The internal sponge strips within the core-filled strips enhance support and provide better wrapping for the buttocks, meeting modern comfort requirements for seat cushions. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the hook plate of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the core-spun strip sewing needle of the present invention;

[0030] Figure 4 This is a schematic diagram of the threading channel of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of the cushion of the present invention.

[0032] In the diagram: 1-base pad; 2-core-spun strip; 3-guide plate; 4-hook plate; 5-core-spun strip sewing needle; 6-pull plate; 7-first swing plate; 8-connecting rod; 9-first rotating disk; 10-vertical rod; 11-locking thread threading mechanism; 12-vertical rod; 13-second swing plate; 14-linkage rod; 15-second rotating disk; 16-guide groove; 17-inclined front end face; 18-pull groove; 19-threading channel; 20-thread retraction channel; 21-core-spun strip threading hole; 22-needle. Detailed Implementation

[0033] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0034] like Figures 1 to 5 As shown, the twisted seat cushion strip sewing machine includes a core-spun strip sewing needle 5 that reciprocates vertically, and a hook plate 4 that slides reciprocally below the core-spun strip sewing needle 5 along the feed direction of the base pad 1.

[0035] When the core-covered strip sewing needle 5 rises, the hook plate 4 moves forward to below the core-covered strip sewing needle 5, tilts the core-covered strip 2 to one side, pulls the core-covered strip 2 backward, and moves it out of the movement area of ​​the core-covered strip sewing needle 5.

[0036] Below the hook plate 4, there is a fixed guide plate 3, and the guide plate 3 has a guide groove 16 corresponding to the core-covered strip sewing needle 5.

[0037] The hook plate 4 includes an inclined front end face 17 that tilts the core strip 2 to one side, and the tail end of the inclined front end face 17 is provided with a groove 18 that pulls the core strip 2 backward.

[0038] A locking thread threading mechanism 11 is provided below the guide plate 3 for reciprocating sliding. When the core strip sewing needle 5 drives the core strip 2 through the bottom of the base pad 1, the threading needle of the locking thread threading mechanism 11 will pass the locking thread through the core strip 2 to prevent the core strip 2 from detaching from the base pad 1.

[0039] The core-spun strip sewing needle 5 has a core-spun strip thread hole 21. Above the core-spun strip thread hole 21 is a threading channel 19 that avoids the locking thread threading mechanism 11. Below the threading channel 19 is a thread-removal channel 20 that removes the locking thread from the threading channel 19.

[0040] The lower end of the core-spun strip sewing needle 5 is provided with an inclined needle tip 22, and the inclination direction of the needle tip 22 is opposite to the inclination direction of the inclined front end face 17.

[0041] When it is necessary to set adjacent core strips 2 symmetrically, the tilting directions of adjacent needles 22 and the tilting front faces 17 of adjacent needles 22 are reversed.

[0042] Several core-spun strip sewing needles 5 are arranged side by side, and the number of hook plates 4 and guide slots 16 matches the number of core-spun strip sewing needles 5.

[0043] Several hook plates 4 are fixedly connected to a pull plate 6. The upper end of the pull plate 6 is hinged to a first swing plate 7 arranged in an L-shape. The other end of the first swing plate 7 is hinged to a connecting rod 8. The lower end of the connecting rod 8 is hinged to a first rotating disk 9 that is rotatably arranged.

[0044] Several core-spun strip sewing needles 5 are fixedly connected to the side plate by a mounting plate. A vertical rod is hinged to the lower end of the side plate. A second swing plate 13 with an L-shape is hinged to the lower end of the vertical rod. A linkage rod 14 is hinged to the other end of the second swing plate 13. The other end of the linkage rod 14 is hinged to a second rotating disk 15 that is rotatably arranged.

[0045] The device also includes a frame, on which all the structures are connected.

[0046] The present invention also discloses a seat cushion produced by the device, wherein the core strip 2 is stitched in a twisted shape to the upper surface of the seat cushion to form the seat cushion.

[0047] The base pad 1 has several puncture holes formed by the core-strip sewing needle 5, which are in the same straight line direction.

[0048] The locking thread threading mechanism 11 and other structures involved in the seat cushion sewing machine are all common in the market. The innovation of this invention lies in the structural improvement of the core-spun strip sewing needle 5, hook plate 4 and guide plate 3. The drive structure and power source are not innovations of this solution, and therefore will not be elaborated here.

[0049] The working principle of this device is as follows:

[0050] When sewing the base pad 1 and the core strip 2, the core strip 2 is passed through the threading hole 21 on the core strip sewing needle 5. The core strip 2 is continuously raised by the core strip sewing needle 5. The unwinding roller unwinds the base pad 1, allowing it to pass horizontally under the guide plate 3. The core strip sewing needle 5 drives the core strip 2 through the guide groove 16. After piercing the base pad 1, the threading needle of the locking thread threading mechanism 11 sequentially passes the locking thread through the threading channel 19. After the locking thread threading mechanism 11 hooks one end of the locking thread, the threading needle exits the threading channel 19. As the core strip sewing needle 5 drives the core strip 2 upward, the locking thread will... The thread withdrawal channel 20 exits and abuts against the bent cored thread to prevent the cored thread from falling out of the puncture hole in the bottom pad 1. After the cored strip sewing needle 5 drives the cored strip 2 to rise and reset, the hook plate 4 moves forward. After the inclined front end face 17 guides the cored strip 2 to one side, the hook plate 4 moves backward and uses the pull groove 18 to pull the cored strip 2 to one end. At the same time, the bottom pad 1, under the winding structure of the sewing machine body, will move backward in sync with the hook plate 4. After the hook plate 4 moves backward into place, the cored strip sewing needle 5 drives the cored strip 2 to pass through the guide groove 16 again to realize the above cycle action.

[0051] This sewing structure enables the core-covered strip 2 with a diameter of 10mm or more to be sewn onto the base pad 1. Furthermore, the guide groove 16 and the hook plate 4 enable the core-covered strip 2 to be reversed, allowing it to be sewn onto the base pad 1 in a twisted pattern. By sewing the core-covered strip 2 onto the base pad 1 in a twisted pattern, the contact area with the human buttocks can be increased, thus improving the support for the human buttocks.

[0052] Furthermore, this device allows for the one-time sewing of core strips 2 with a diameter of 10mm or more onto the base pad 1 to achieve the required cushion thickness. Additionally, the sponge strips inside the core strips 2 enhance support and provide better support and wrapping for the buttocks, thus meeting modern people's comfort requirements for seat cushions.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A twisted seat cushion strip sewing machine, characterized in that: Includes a core-spun strip sewing needle (5) that moves vertically back and forth, and a hook plate (4) that slides back and forth below the core-spun strip sewing needle (5) along the feeding direction of the bottom pad (1). When the core-covered strip sewing needle (5) rises, the hook plate (4) moves forward to below the core-covered strip sewing needle (5), tilts the core-covered strip (2) to one side, pulls the core-covered strip (2) backward, and moves it out of the movement area of ​​the core-covered strip sewing needle (5). The hook plate (4) includes an inclined front end face (17) that tilts the core strip (2) to one side, and the tail end of the inclined front end face (17) is provided with a pull groove (18) that pulls the core strip (2) backward. Below the hook plate (4), there is a fixed guide plate (3), and the guide plate (3) has a guide groove (16) corresponding to the core-covered strip sewing needle (5). A locking thread threading mechanism (11) is provided below the guide plate (3) for reciprocating sliding. When the core-covered strip sewing needle (5) drives the core-covered strip (2) through the bottom of the base pad (1), the threading needle of the locking thread threading mechanism (11) will pass the locking thread through the core-covered strip (2) to prevent the core-covered strip (2) from detaching from the base pad (1). The lower end of the core-spun strip sewing needle (5) is provided with an inclined needle tip (22), and the inclined direction of the needle tip (22) is opposite to the inclined direction of the inclined front end face (17).

2. The twisted seat cushion strip sewing machine according to claim 1, characterized in that: The core-spun strip sewing needle (5) has a core-spun strip thread hole (21), and a threading channel (19) is provided above the core-spun strip thread hole (21) to avoid the locking thread threading mechanism (11). A thread-removal channel (20) is provided below the threading channel (19) to remove the locking thread from the threading channel (19).

3. The twisted seat cushion strip sewing machine according to claim 1, characterized in that: Several core-spun strip sewing needles (5) are arranged side by side, and the number of hook plates (4) and guide slots (16) matches the number of core-spun strip sewing needles (5).

4. The twisted seat cushion strip sewing machine according to claim 1, characterized in that: Several hook plates (4) are fixed together on a pull plate (6). The upper end of the pull plate (6) is hinged to a first swing plate (7) arranged in an L-shape. The other end of the first swing plate (7) is hinged to a connecting rod (8). The lower end of the connecting rod (8) is hinged to a first rotating disk (9) that is rotatably arranged. Several core-spun strip sewing needles (5) are fixed together on the side plate. A vertical rod is hinged to the lower end of the side plate. A second swing plate (13) in an L-shape is hinged to the lower end of the vertical rod. A linkage rod (14) is hinged to the other end of the second swing plate (13). The other end of the linkage rod (14) is hinged to a second rotating disk (15) that is rotatably arranged.

5. The seat cushion produced by the twisted seat cushion strip sewing machine according to any one of claims 1-4, characterized in that: The core strip (2) is stitched in a twisted shape onto the upper surface of the cushion to form the cushion.

6. The seat cushion produced by the twisted seat cushion strip sewing machine according to claim 5, characterized in that: The base pad (1) has several puncture holes formed by the core-strip sewing needle (5) in the same straight direction.

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